中文摘要：

为了解秦皇岛洋戴河流域浅层地下水咸化程度,开展了野外调查和水样采集,现场测试EC、TDS指标,并对水样进行了室内水化学分析。应用层次分析法结合Arcgis对选取的6个指标（Cl离子、TDS、Li离子、钠吸附比、硝酸盐、潜在盐度）进行权重计算、归一化处理和栅格计算,得出地下水咸化等级分区（未咸化区、轻微咸化区、中等咸化区、严重咸化区）。咸化最严重区域位于沿海平原,包括枣园村、王各庄村。中度咸化区部分位于沿海平原,包括都寨村、西陆庄村、蒋营村、樊各庄,主要是由海水入侵导致的;而樊各庄咸化的原因是海水入侵和工业废水的污染;其他中度咸化区位于低山丘陵区,包括大湾子村、兴隆寨村,则是由水岩作用、农业污水、生活污水造成的。轻微咸化区主要分布在中等咸化区周围,未咸化区集中在山前平原区。

英文摘要：

The paper is aimed at presenting the results of a field investigation concerning the degree of the shallow groundwater salinization in the Yanghe Daihe River basin of Qinhuangdao City. For the research purpose,we have chosen samples from the corresponding river spots and carried out the analysis for cations and anions in the laboratory conditions. Moreover,we have also measured the electrical conductivity（ EC） and the total dissolved solids（ TDS） on the research fields. What is more important,we have selected six parameters,including chloride,TDS,lithium,sodium adsorption ratio,potential salinity and nitrate,so as to build up an analytic hierarchy process（ AHP） model for calculating the weights of every parameter based on the variation of the ion. In addition,we have adopted the inverse distance weighted interpolation method to define the grade of parameters in the spatial analysis tools of Arcgis. In the meantime,we have determined the normalized grades of the corresponding parameters via the raster calculation in Arcgis,which has enabled us to work out the different parameters on the same standard. And,finally,the grade of the groundwater salinization parameters has been made multiplied by the corresponding weight,and,then has been subjected to determine. Actually,there are four categories of groundwater salinization,that is,zero-level salinization,slight salinization,moderate salinization and serious salinization. In the investigated areas,we have found serious salinization in the beach and coastal plain,including Zaoyuan village and Wanggezhang village. Moderate salinization has been found also in the coastal plain,including Duzhai village,Xiluzhuang village and Jiangying village. Furthermore, we have done the analysis oriented on searching for the causes of the groundwater salinization. In the areas close to the previous Zaoyuan water sources area,we have done sufficient exploitation of groundwater used for the domestic,industrial and agricultural purposes,which has led actually to slight degrada